1
|
Rane AS, Nair VS, Joshi RS, Giri AP. Domain Shuffling and Site-Saturation Mutagenesis for the Enhanced Inhibitory Potential of Amaranthaceae α-Amylase Inhibitors. Protein J 2023; 42:519-532. [PMID: 37598128 DOI: 10.1007/s10930-023-10148-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/31/2023] [Indexed: 08/21/2023]
Abstract
Amaranthaceae α-amylase inhibitors (AAIs) are knottin-type proteins with selective inhibitory potential against coleopteran α-amylases. Their small size and remarkable stability make them exciting molecules for protein engineering to achieve superior selectivity and efficacy. In this report, we have designed a set of AAI pro- and mature peptides chimeras. Based on in silico analysis, stable AAI chimeras having a stronger affinity with target amylases were selected for characterization. In vitro studies validated that chimera of the propeptide from Chenopodium quinoa α-AI and mature peptide from Beta vulgaris α-AI possess 3, 7.6, and 4.26 fold higher inhibition potential than parental counterparts. Importantly, recombinant AAI chimera retained specificity towards target coleopteran α-amylases. In addition, to improve the inhibitory potential of AAI, we performed in silico site-saturation mutagenesis. Computational analysis followed by experimental data showed that substituting Asparagine at the 6th position with Methionine had a remarkable increase in the specific inhibition potential of Amaranthus hypochondriacus α-AI. These results provide structural-functional insights into the vitality of AAI propeptide and a potential hotspot for mutagenesis to enhance the AAI activity. Our investigation will be a toolkit for AAI's optimization and functional differentiation for future biotechnological applications.
Collapse
Affiliation(s)
- Ashwini S Rane
- Biochemical Sciences Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, Maharashtra, 411008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, 201002, India
| | - Vineetkumar S Nair
- Biochemical Sciences Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, Maharashtra, 411008, India
| | - Rakesh S Joshi
- Biochemical Sciences Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, Maharashtra, 411008, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, 201002, India.
| | - Ashok P Giri
- Biochemical Sciences Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, Maharashtra, 411008, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, 201002, India.
| |
Collapse
|
2
|
Huang S, Huang H, Xie J, Wang F, Fan S, Yang M, Zheng C, Han L, Zhang D. The latest research progress on the prevention of storage pests by natural products: Species, mechanisms, and sources of inspiration. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
|
3
|
Yan H, Wen F, Xiang H, Wen Y, Shang D, Liu A, Niu Y, Xia Q, Wang G. Biochemical characterization and overexpression of an α-amylase (BmAmy) in silkworm, Bombyx mori. INSECT MOLECULAR BIOLOGY 2022; 31:251-259. [PMID: 34923696 DOI: 10.1111/imb.12755] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 11/30/2021] [Accepted: 12/12/2021] [Indexed: 06/14/2023]
Abstract
Silkworm (Bombyx mori) is the only fully domesticated insect. As an economically important insect, nutrition utilization is important for its productivity. Hence, the present study investigated the expression pattern of BmAmy, an α-amylase, in B. mori. BmAmy protein purification and biochemical characterization were performed, and effects of BmAmy overexpression were assessed. Real-time quantitative reverse transcription polymerase chain reaction indicated that BmAmy transcription was positively correlated with the silkworm's food intate. Moreover, enzymatic activity assay results showed that BmAmy had significant α-amylase activity of about 1 mg/min/mg protein. Furthermore, treatment with mulberry amylase inhibitors MnAI1 and MnAI2 resulted to 89.92% and 93.67% inhibition in BmAmy activity, respectively, and the interaction between BmAmy and MnAI was also confirmed by protein docking analysis. A silkworm line that specifically overexpressed BmAmy in the midgut was generated through piggyBac-based transgenic technology, and compared to those of non-transgenic silkworms, the whole cocoon and cocoon shell weights of these transgenic silkworms increased by 10.13% and 18.32%, respectively, in the female group, and by 5.83% and 6.00%, respectively, in the male group. These results suggested that BmAmy may be a suitable target for breeding better silkworm varieties in the future.
Collapse
Affiliation(s)
- Hao Yan
- State Key Laboratory of Silkworm Genome Biology, Biological Science Research Center, Southwest University, Chongqing, China
- Research and Development Center, China Tobacco Yunnan Industrial Co. Ltd., Kunming, China
- Chongqing Key Laboratory of Sericultural Science, Southwest University, Chongqing, China
- Chongqing Engineering and Technology Research Center for Novel Silk Materials, Southwest University, Chongqing, China
| | - Feng Wen
- State Key Laboratory of Silkworm Genome Biology, Biological Science Research Center, Southwest University, Chongqing, China
- Chongqing Key Laboratory of Sericultural Science, Southwest University, Chongqing, China
- Chongqing Engineering and Technology Research Center for Novel Silk Materials, Southwest University, Chongqing, China
| | - Haiying Xiang
- Research and Development Center, China Tobacco Yunnan Industrial Co. Ltd., Kunming, China
| | - Yuchan Wen
- State Key Laboratory of Silkworm Genome Biology, Biological Science Research Center, Southwest University, Chongqing, China
- Chongqing Key Laboratory of Sericultural Science, Southwest University, Chongqing, China
- Chongqing Engineering and Technology Research Center for Novel Silk Materials, Southwest University, Chongqing, China
| | - Deli Shang
- State Key Laboratory of Silkworm Genome Biology, Biological Science Research Center, Southwest University, Chongqing, China
- Chongqing Key Laboratory of Sericultural Science, Southwest University, Chongqing, China
- Chongqing Engineering and Technology Research Center for Novel Silk Materials, Southwest University, Chongqing, China
| | - Anyang Liu
- State Key Laboratory of Silkworm Genome Biology, Biological Science Research Center, Southwest University, Chongqing, China
- Chongqing Key Laboratory of Sericultural Science, Southwest University, Chongqing, China
- Chongqing Engineering and Technology Research Center for Novel Silk Materials, Southwest University, Chongqing, China
| | - Yicheng Niu
- State Key Laboratory of Silkworm Genome Biology, Biological Science Research Center, Southwest University, Chongqing, China
- Chongqing Key Laboratory of Sericultural Science, Southwest University, Chongqing, China
- Chongqing Engineering and Technology Research Center for Novel Silk Materials, Southwest University, Chongqing, China
| | - Qingyou Xia
- State Key Laboratory of Silkworm Genome Biology, Biological Science Research Center, Southwest University, Chongqing, China
- Chongqing Key Laboratory of Sericultural Science, Southwest University, Chongqing, China
- Chongqing Engineering and Technology Research Center for Novel Silk Materials, Southwest University, Chongqing, China
| | - Genhong Wang
- State Key Laboratory of Silkworm Genome Biology, Biological Science Research Center, Southwest University, Chongqing, China
- Chongqing Key Laboratory of Sericultural Science, Southwest University, Chongqing, China
- Chongqing Engineering and Technology Research Center for Novel Silk Materials, Southwest University, Chongqing, China
| |
Collapse
|
4
|
Mu J, Klosek A, Brennan MA, Chen Z, Hui X, Wu G, Brennan CS. The effects of blackcurrant powder (
Ribes nigrum
) supplementation on pasting properties, physicochemical properties, and nutritive values of starch derived from mung bean (
Vigna radiata
L.) and pea (
Pisum sativum
L.). Int J Food Sci Technol 2021. [DOI: 10.1111/ijfs.15204] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Jianlou Mu
- College of Food Science and Technology Hebei Agricultural University Baoding 071001 China
| | - Axelle Klosek
- Department of Wine, Food and Molecular Biosciences Faculty of Agriculture and Life Sciences Lincoln University Christchurch New Zealand
- AgroSup Dijon Dijion France
| | - Margaret A. Brennan
- Department of Wine, Food and Molecular Biosciences Faculty of Agriculture and Life Sciences Lincoln University Christchurch New Zealand
- School of Science RMIT Melbourne Australia
| | - Zhizhou Chen
- College of Food Science and Technology Hebei Agricultural University Baoding 071001 China
| | - Xiaodan Hui
- Department of Wine, Food and Molecular Biosciences Faculty of Agriculture and Life Sciences Lincoln University Christchurch New Zealand
- Riddet Institute Palmerston North New Zealand
| | - Gang Wu
- Department of Wine, Food and Molecular Biosciences Faculty of Agriculture and Life Sciences Lincoln University Christchurch New Zealand
- Riddet Institute Palmerston North New Zealand
| | - Charles S. Brennan
- School of Science RMIT Melbourne Australia
- Riddet Institute Palmerston North New Zealand
| |
Collapse
|
5
|
Wu G, Hui X, Mu J, Brennan MA, Brennan CS. Functionalization of whey protein isolate fortified with blackcurrant concentrate by spray-drying and freeze-drying strategies. Food Res Int 2021; 141:110025. [PMID: 33641954 DOI: 10.1016/j.foodres.2020.110025] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 11/26/2020] [Accepted: 12/09/2020] [Indexed: 01/08/2023]
Abstract
A solution of whey protein isolate was combined with blackcurrant concentrate via spray-drying and freeze-drying techniques separately to develop novel protein ingredients, (SWB and FWB). Chemical compositions, colour profiles, total anthocyanin content and encapsulation efficacy of the protein ingredients were evaluated. An in vitro digestion process was employed to observe the changes in total phenolic content, antioxidant activity, and predictive in vitro glycaemic response of the protein ingredients. The half maximal inhibitory concentration (IC50) towards α-Amylase, and a molecular docking study on the interactions of α-Amylase with anthocyanins, were both performed to investigate the potential mechanisms of hypoglycaemic properties of these protein ingredients. The protein contents of SWB and FWB were 67.94 ± 0.47% and 68.16 ± 0.77%, respectively. Blackcurrant concentrate significantly (p < 0.001) changed the colour profiles of whey protein isolate. SWB obtained a higher total phenol content (3711.28 ± 4.36 μg/g), total anthocyanin content (85390.80 ± 162.81 μg/100 g), and greater encapsulation efficacy (99.64 ± 0.16%) than those of FWB (3413.03 ± 20.60 μg/g, 64230.24 ± 441.08 μg/100 g, and 95.43 ± 0.14%, respectively). Total phenolic content and antioxidant activities of SWB and FWB decreased after the in vitro digestion. The reducing sugar released during the in vitro digestion from SWB and FWB decreased compared with their corresponding controls (SWC and FWC). FWB (IC50 = 73.46 μg/mL) exhibited stronger α-Amylase inhibitory activity than SWB (IC50 = 81.46 μg/mL). Different anthocyanins differed from binding affinities to bind with the active sites of α-Amylase via formation of hydrogen bonds. This study suggested whey protein encapsulated-blackcurrant concentrate might be an innovative food product with improved nutritional profiles. Both spray- and freeze-drying are potential options to this encapsulation.
Collapse
Affiliation(s)
- Gang Wu
- Department of Wine, Food and Molecular Biosciences, Faculty of Agriculture & Life Sciences, Lincoln University, Christchurch, New Zealand; Riddet Institute, Palmerston North, New Zealand
| | - Xiaodan Hui
- Department of Wine, Food and Molecular Biosciences, Faculty of Agriculture & Life Sciences, Lincoln University, Christchurch, New Zealand; Riddet Institute, Palmerston North, New Zealand
| | - Jianlou Mu
- College of Food Science and Technology, Hebei Agricultural University, Baoding 071001, China
| | - Margaret A Brennan
- Department of Wine, Food and Molecular Biosciences, Faculty of Agriculture & Life Sciences, Lincoln University, Christchurch, New Zealand
| | - Charles S Brennan
- Department of Wine, Food and Molecular Biosciences, Faculty of Agriculture & Life Sciences, Lincoln University, Christchurch, New Zealand; Riddet Institute, Palmerston North, New Zealand.
| |
Collapse
|
6
|
Hámori C, Remenyik J, Kandra L, Gyémánt G. Colorado potato beetle alpha-amylase: Purification, action pattern and subsite mapping for exploration of active centre. Int J Biol Macromol 2020; 168:350-355. [PMID: 33310101 DOI: 10.1016/j.ijbiomac.2020.12.071] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 10/29/2020] [Accepted: 12/08/2020] [Indexed: 11/19/2022]
Abstract
Colorado potato beetle is an invasive insect herbivore and one of the most challenging agricultural pests globally. This study is the first characterization of the active centre of Colorado potato beetle (Leptinotarsa decemlineata) α-amylase (LdAmy). Bond cleavage frequency values for LdAmy were determined by HPLC product analysis on a chromophore labelled maltooligomer substrate series. Binding energies between amino acid moieties of subsites and glucose residues of substrate were calculated. Active site contains six subsites in the binding region of LdAmy; four glycone- (-4, -3, -2, -1) and two aglycone-binding sites (+1, +2). Subsite map calculation resulted in apparent binding energies -11.8 and - 11.0 kJ/mol for subsites (+2) and (-3), respectively, which revealed very favorable interactions at these positions. Structures of binding sites of LdAmy and mammalian α-amylases show similarity, but there are variations in the binding energies at subsite (-2) and (-4). Differences were interpreted by comparison of amino acid sequences of human salivary α-amylase (HSA) and porcine pancreatic α-amylase (PPA) and two insect (Leptinotarsa decemlineata and Tenebrio molitor) enzymes. The observed substitution of positively charged His305 in HSA at subsite (-2) with an acidic Asp in LdAmy in the same position may explain the obtained energy reduction.
Collapse
Affiliation(s)
- Csaba Hámori
- Department of Inorganic and Analytical Chemistry, Faculty of Sciences and Technology, University of Debrecen, H-4032 Debrecen, Hungary
| | - Judit Remenyik
- Institute of Food Technology, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, H-4032 Debrecen, Hungary
| | - Lili Kandra
- Department of Inorganic and Analytical Chemistry, Faculty of Sciences and Technology, University of Debrecen, H-4032 Debrecen, Hungary
| | - Gyöngyi Gyémánt
- Department of Inorganic and Analytical Chemistry, Faculty of Sciences and Technology, University of Debrecen, H-4032 Debrecen, Hungary.
| |
Collapse
|
7
|
Rane AS, Venkatesh V, Joshi RS, Giri AP. Molecular investigation of Coleopteran specific α-Amylase inhibitors from Amaranthaceae members. Int J Biol Macromol 2020; 163:1444-1450. [PMID: 32735926 DOI: 10.1016/j.ijbiomac.2020.07.219] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 06/29/2020] [Accepted: 07/25/2020] [Indexed: 11/26/2022]
Abstract
α-Amylase inhibitors (α-AIs) target α-amylases and interfere with the carbohydrate digestion of insects. Among different classes of α-AIs, a knottin-type inhibitor from Amaranthus hypochondriacus (AhAI) was found to be specific against coleopteran storage pests. In this report, we have characterized three previously unidentified knottin-type α-AIs from various Amaranthaceae plants namely, Amaranthus hypochondriacus (AhAI2), Alternanthera sessilis (AsAI) and Chenopodium quinoa (CqAI). They contain a signal peptide, pro-peptide, and mature peptide. The mature peptides of the new α-AIs shared 68 to 78% identity with AhAI and have highly variable pro-peptide regions. Along with the cystine-knot fold, they showed conservation of reactive site residues. All recombinant α-AIs were successfully expressed in their active form and native state using an oxidative cytoplasmic environment. Inhibition studies against various amylases revealed that these inhibitors showed selective inhibition of coleopteran recombinant insect α-amylases viz., Tribolium castaneum, and Callosobruchus chinensis. Tribolium castaneum α-amylase inhibition potency was highest for AhAI2 (Ki ~ 15 μM) followed by AsAI (Ki ~ 43 μM) and CqAI (Ki ~ 61 μM). Interaction analysis of these inhibitors illustrated that the reactive site of inhibitors make several non-covalent interactions with the substrate-binding pocket of coleopteran α-amylases. The selectivity of these inhibitors against coleopteran α-amylases highlights their potential in storage grain pest control.
Collapse
Affiliation(s)
- Ashwini S Rane
- Biochemical Sciences Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, Maharashtra, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, Uttar Pradesh, India
| | - Varun Venkatesh
- Biochemical Sciences Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, Maharashtra, India
| | - Rakesh S Joshi
- Biochemical Sciences Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, Maharashtra, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, Uttar Pradesh, India.
| | - Ashok P Giri
- Biochemical Sciences Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, Maharashtra, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, Uttar Pradesh, India.
| |
Collapse
|
8
|
Rane AS, Joshi RS, Giri AP. Molecular determinant for specificity: Differential interaction of α-amylases with their proteinaceous inhibitors. Biochim Biophys Acta Gen Subj 2020; 1864:129703. [PMID: 32805319 DOI: 10.1016/j.bbagen.2020.129703] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 08/10/2020] [Accepted: 08/13/2020] [Indexed: 11/29/2022]
Abstract
BACKGROUND α-Amylase inhibitors (α-AIs) belong to the discrete classes, and exhibited differential specificities against α-amylases from various sources. Several α-amylases and their complexes with inhibitors at the molecular level have been studied in detail. Interestingly, some α-AIs depict specific and selective interactions amid different insect α-amylases. SCOPE OF REVIEW There are studies to understand evolutionary variability and functional differentiation of insect α-amylases and their cognate inhibitors. We have examined sequence, structural, and interaction diversity between various α-amylases and α-AIs. Based on these analyses, we are providing a potential basis for the functional differentiation among certain insect α-amylases concerning mammalian counterparts and their interactions with different proteinaceous α-AIs. MAJOR CONCLUSIONS Insect α-amylases have conserved domain architecture with differences in length, number of disulfide bonds, and secondary structure. Furthermore, few of them exhibit variable characteristics like chloride dependent activity, the presence of N-terminal glutamine residue to protect against proteolytic degradation, and loop variations near the enzyme active site. Conformation of α-AI protein could be an essential factor for their specificity and binding affinities towards target α-amylase(s). Furthermore, variation into the enzyme binding pocket residues might contribute to differential interactions with inhibitors. GENERAL SIGNIFICANCE Molecular insights in the interactions between insect α-amylases and plant α-AI will provide the details of mechanisms assisting the inhibitor specificity. Furthermore, this information will help to design potent and effective α-AIs against specific α-amylase.
Collapse
Affiliation(s)
- Ashwini S Rane
- Plant Molecular Biology Unit, Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Pune 411 008, Maharashtra, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, Uttar Pradesh, India
| | - Rakesh S Joshi
- Plant Molecular Biology Unit, Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Pune 411 008, Maharashtra, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, Uttar Pradesh, India.
| | - Ashok P Giri
- Plant Molecular Biology Unit, Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Pune 411 008, Maharashtra, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, Uttar Pradesh, India.
| |
Collapse
|
9
|
Szilágyi E, Hámori C, Bíró-Molnár P, Kandra L, Remenyik J, Gyémánt G. Cooperation of enzymes involved in carbohydrate digestion of Colorado potato beetle ( Leptinotarsa decemlineata, Say). BULLETIN OF ENTOMOLOGICAL RESEARCH 2019; 109:695-700. [PMID: 30971323 DOI: 10.1017/s0007485319000099] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Colorado potato beetle (Leptinotarsa decemlineata, Say) is the main pest of Solanaceae and its survival is mainly dependent on the carbohydrate digestion. Characterizing the gut enzymes may help us with finding effective inhibitors for plant protection. Activity measurements revealed that gut extracts contain α- and β-glucosidase in addition to α-amylase. For larvae, amylase activity was detected only in gut saturated with nutrients. Leptinotarsa decemlineata α-amylase (LDAmy) had optimum pH of 6.0 and was active under 30-40°C temperature measured on a selective α-amylase substrate, 2-chloro-4-nitrophenyl-4-O-α-D-galactopyranosyl-maltoside. HPLC analysis demonstrated dimer, trimer, and tetramer reducing end amylolytic products from 2-chloro-4-nitrophenyl-maltoheptaoside substrate in similar ratio than that of during porcine pancreatic α-amylase (PPA) catalyzed hydrolysis. The 4,6-O-benzylidene-modified substrate (BzG7PNP) is very stable toward hydrolysis by exo-glycosidases, therefore is very useful to monitor the digestion catalyzed by α-amylases exclusively. Similarly to PPA active site, three glycon and two aglycon binding sites are suggested for LDAmy based on the pattern of early hydrolysis products of BzG7PNP. The observed similarity between LDAmy and PPA raises the possibility of using known inhibitors of mammalian α-amylases to protect the potato plant from attack of Colorado potato beetle.
Collapse
Affiliation(s)
- E Szilágyi
- Institute of Food Technology, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, H-4032 Debrecen, Hungary
| | - C Hámori
- Department of Inorganic and Analytical Chemistry, Faculty of Sciences and Technology, University of Debrecen, H-4032 Debrecen, Hungary
| | - P Bíró-Molnár
- Institute of Food Technology, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, H-4032 Debrecen, Hungary
| | - L Kandra
- Institute of Food Technology, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, H-4032 Debrecen, Hungary
| | - J Remenyik
- Institute of Food Technology, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, H-4032 Debrecen, Hungary
| | - G Gyémánt
- Department of Inorganic and Analytical Chemistry, Faculty of Sciences and Technology, University of Debrecen, H-4032 Debrecen, Hungary
| |
Collapse
|
10
|
Ajaha A, Bouayad N, Aarab A, Rharrabe K. Effect of 20-Hydroxyecdysone, a Phytoecdysteroid, on Development, Digestive, and Detoxification Enzyme Activities of Tribolium castaneum (Coleoptera: Tenebrionidae). JOURNAL OF INSECT SCIENCE (ONLINE) 2019; 19:5602640. [PMID: 31639190 PMCID: PMC6804910 DOI: 10.1093/jisesa/iez097] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Indexed: 05/11/2023]
Abstract
Plants present a delimited reservoir of biologically active compounds. Many plants synthesize several compounds of secondary metabolism, such as alkaloids, terpenoids, phenolics, steroids, etc. Such compounds are generally thought to be involved in plant-insect interactions. Phytoecdysteroids are a class of chemicals that plants synthesize; these compounds are analogues of molting hormones produced by insects. In this work, the effect of the 20-hydroxyecdysone, which is a molecule that belongs to the family of phytoecdysteroids, was tested on an insect pest, Tribolium castaneum (Herbst). Firstly, the effect of this molecule on post-embryonic development parameters was tested after ingestion at 300, 600, 900, and 1,200 ppm. Secondly, the effect of the 20-hydroxyecdysone was also tested on the biological parameters (proteins, alpha-amylase, detoxification enzymes). The results of the post-embryonic parameters test showed an important induction of larval mortality and a significant reduction of pupation and adult emergence rates. On the other hand, the test on the biological parameters showed that the 20-hydroxyecdysone caused a significant decrease in the levels of soluble proteins in treated larvae. In addition, the alpha-amylase activity was significantly inhibited by the ingestion of the phytoecdysteroid. And there was also a disruption of detoxification enzymes. The whole of the disturbances recorded in this work prove that phytoecdysteroids are thought to have potential value on T. castaneum control.
Collapse
Affiliation(s)
- Ayoub Ajaha
- Research Team in Biological Engineering, Agrifood and Aquaculture, Faculty Polydisciplinary – Abdelmalek Essaadi University, Larache, Morocco
- Corresponding author, e-mail:
| | - Noureddin Bouayad
- Research Team in Biotechnologies and Biomolecular Engineering, Faculty of Science and Technology – Abdelmalek Essaadi University, Tangier, Morocco
| | - Ahmed Aarab
- Research Team in Biotechnologies and Biomolecular Engineering, Faculty of Science and Technology – Abdelmalek Essaadi University, Tangier, Morocco
| | - Kacem Rharrabe
- Research Team in Biological Engineering, Agrifood and Aquaculture, Faculty Polydisciplinary – Abdelmalek Essaadi University, Larache, Morocco
| |
Collapse
|
11
|
Da Lage JL. The Amylases of Insects. INTERNATIONAL JOURNAL OF INSECT SCIENCE 2018; 10:1179543318804783. [PMID: 30305796 PMCID: PMC6176531 DOI: 10.1177/1179543318804783] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Accepted: 09/09/2018] [Indexed: 05/26/2023]
Abstract
Alpha-amylases are major digestive enzymes that act in the first step of maltopolysaccharide digestion. In insects, these enzymes have long been studied for applied as well as purely scientific purposes. In many species, amylases are produced by multiple gene copies. Rare species are devoid of Amy gene. They are predominantly secreted in the midgut but salivary expression is also frequent, with extraoral activity. Enzymological parameters are quite variable among insects, with visible trends according to phylogeny: Coleopteran amylases have acidic optimum activity, whereas dipteran amylases have neutral preference and lepidopteran ones have clear alkaline preference. The enzyme structure shows interesting variations shaped by evolutionary convergences, such as the recurrent loss of a loop involved in substrate handling. Many works have focused on the action of plant amylase inhibitors on pest insect amylases, in the frame of crop protection by transgenesis. It appears that sensitivity or resistance to inhibitors is finely tuned and very specific and that amylases and their inhibitors have coevolved. The multicopy feature of insect amylases appears to allow tissue-specific or stage-specific regulation, but also to broaden enzymological abilities, such as pH range, and to overcome plant inhibitory defenses.
Collapse
Affiliation(s)
- Jean-Luc Da Lage
- UMR 9191 Évolution, Génomes, Comportement, Écologie,
CNRS, IRD, Université Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette,
France
| |
Collapse
|
12
|
Zheng B, Zhang H, Wang L, Guo Y, Chen P. Characterization of 16-kDa major allergen with α-amylase inhibitor domain in tartary buckwheat seeds. Mol Immunol 2018; 94:121-130. [DOI: 10.1016/j.molimm.2017.12.024] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 12/19/2017] [Accepted: 12/27/2017] [Indexed: 11/16/2022]
|
13
|
Bhide AJ, Channale SM, Yadav Y, Bhattacharjee K, Pawar PK, Maheshwari VL, Gupta VS, Ramasamy S, Giri AP. Genomic and functional characterization of coleopteran insect-specific α-amylase inhibitor gene from Amaranthus species. PLANT MOLECULAR BIOLOGY 2017; 94:319-332. [PMID: 28405784 DOI: 10.1007/s11103-017-0609-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Accepted: 03/31/2017] [Indexed: 06/07/2023]
Abstract
The smallest 32 amino acid α-amylase inhibitor from Amaranthus hypochondriacus (AAI) is reported. The complete gene of pre-protein (AhAI) encoding a 26 amino acid (aa) signal peptide followed by the 43 aa region and the previously identified 32 aa peptide was cloned successfully. Three cysteine residues and one disulfide bond conserved within known α-amylase inhibitors were present in AhAI. Identical genomic and open reading frame was found to be present in close relatives of A. hypochondriacus namely Amaranthus paniculatus, Achyranthes aspera and Celosia argentea. Interestingly, the 3'UTR of AhAI varied in these species. The highest expression of AhAI was observed in A. hypochondriacus inflorescence; however, it was not detected in the seed. We hypothesized that the inhibitor expressed in leaves and inflorescence might be transported to the seeds. Sub-cellular localization studies clearly indicated the involvement of AhAI signal peptide in extracellular secretion. Full length rAhAI showed differential inhibition against α-amylases from human, insects, fungi and bacteria. Particularly, α-amylases from Helicoverpa armigera (Lepidoptera) were not inhibited by AhAI while Tribolium castaneum and Callosobruchus chinensis (Coleoptera) α-amylases were completely inhibited. Molecular docking of AhAI revealed tighter interactions with active site residues of T. castaneum α-amylase compared to C. chinensis α-amylase, which could be the rationale behind the disparity in their IC50. Normal growth, development and adult emergence of C. chinensis were hampered after feeding on rAhAI. Altogether, the ability of AhAI to affect the growth of C. chinensis demonstrated its potential as an efficient bio-control agent, especially against stored grain pests.
Collapse
Affiliation(s)
- Amey J Bhide
- Plant Molecular Biology Unit, Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, 411 008, India
| | - Sonal M Channale
- Plant Molecular Biology Unit, Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, 411 008, India
| | - Yashpal Yadav
- Plant Molecular Biology Unit, Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, 411 008, India
| | - Kabita Bhattacharjee
- Plant Molecular Biology Unit, Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, 411 008, India
| | - Pankaj K Pawar
- Department of Biochemistry, Shivaji University, Kolhapur, 416 004, India
| | - V L Maheshwari
- School of Life Sciences, North Maharashtra University, Jalgaon, 425 001, India
| | - Vidya S Gupta
- Plant Molecular Biology Unit, Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, 411 008, India
| | - Sureshkumar Ramasamy
- Plant Molecular Biology Unit, Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, 411 008, India
| | - Ashok P Giri
- Plant Molecular Biology Unit, Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, 411 008, India.
| |
Collapse
|
14
|
Zhang T, Liang J, Wang P, Xu Y, Wang Y, Wei X, Fan M. Purification and characterization of a novel phloretin-2'-O-glycosyltransferase favoring phloridzin biosynthesis. Sci Rep 2016; 6:35274. [PMID: 27731384 PMCID: PMC5059724 DOI: 10.1038/srep35274] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2016] [Accepted: 09/28/2016] [Indexed: 01/20/2023] Open
Abstract
Phloretin-2'-O-glycosyltransferase (P2'GT) catalyzes the last glycosylation step in the biosynthesis of phloridzin that contributes to the flavor, color and health benefits of apples and processed apple products. In this work, a novel P2'GT of Malus x domestica (MdP2'GT) with a specific activity of 46.82 μkat/Kg protein toward phloretin and uridine diphosphate glucose (UDPG) at an optimal temperature of 30 °C and pH 8.0 was purified from the engineered Pichia pastoris broth to homogeneity by anion exchange chromatography, His-Trap affinity chromatography and gel filtration. The purified MdP2'GT was low N-glycosylated and secreted as a stable dimer with a molecular mass of 70.7 kDa in its native form. Importantly, MdP2'GT also exhibited activity towards quercetin and adenosine diphosphate glucose (ADPG), kaempferol and UDPG, quercetin and UDP-galactose, isoliquiritigenin and UDPG, and luteolin and UDPG, producing only one isoquercitrin, astragalin, hyperoside, isoliquiritin, or cynaroside, respectively. This broad spectrum of activities make MdP2'GT a promising biocatalyst for the industrial preparation of the corresponding polyphenol glycosides, preferably for their subsequent isolation and purification. Besides, MdP2'GT displayed the lowest Km and the highest kcat/Km for phloretin and UDPG compared to all previously reported P2'GTs, making MdP2'GT favor phloridzin synthesis the most.
Collapse
Affiliation(s)
- Tingjing Zhang
- College of Food Science and Engineering, Northwest A&F University, Yang ling, Shaanxi, 712100, China
| | - Jianqiang Liang
- College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Panxue Wang
- Department of Food Science, University of Massachusetts, Amherst, MA01003, USA
| | - Ying Xu
- College of Life Science and Engineering, Shaanxi University of Science &Technology, Xi'an, Shaanxi, 710021, China
| | - Yutang Wang
- College of Food Science and Engineering, Northwest A&F University, Yang ling, Shaanxi, 712100, China
| | - Xinyuan Wei
- College of Food Science and Engineering, Northwest A&F University, Yang ling, Shaanxi, 712100, China
| | - Mingtao Fan
- College of Food Science and Engineering, Northwest A&F University, Yang ling, Shaanxi, 712100, China
| |
Collapse
|